Class : Phosphates, arsenates, vanadates
    Subclass : Hydrated arsenates
    Crystal system : Monoclinic
    Chemistry : Zn₂(AsO₄)(OH) H₂O
    Rarity : Rare

Legrandite is a secondary zinc arsenate formed in the superficial oxidation zone of these zinciferous deposits, impregnated in limestone and more rarely in granite pegmatites, where it rubs shoulders with other oxidized zinc minerals (smithsonite, adamite, etc...). It owes its name to Mr. Legrand, Belgian mine manager who collected the first sample of this mineral at the Flor de Peña Mine in Mexico. It usually occurs as divergent or radial aggregates of elongated lamellar prismatic crystals, colorless to slightly greenish white, more commonly canary yellow to honey yellow. Its very lively resinous luster is characteristic. It is a rare mineral sought after by collectors.

Main photo : Legrandite from Ojuela, Mapimi, Mexico

No twinning known for this mineral species.

No fake inventories for this mineral species.